A heat pump based on the vapor-compression refrigeration cycle uses R-134a as the working fluid. The heat pump is used to heat a 1000 SCFM of air...
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I am having a hard time figuring out where to find certain information for the US units and getting mixed up units to not get the right answers that are posted in the problem.

A heat pump based on the vapor-compression refrigeration cycle uses R-134a as the
working fluid. The heat pump is used to heat a 1000 SCFM of air from 40 F to 90 F.
The condenser pressure is 160 psia, the evaporator pressure is 30 psia, and the
isentropic efficiency of the compressor is 85%.
a) Find the enthalpy of the R-134a exiting the compressor (answer: 122.98 Btu/lbm).
b) Find the coefficient of performance of the heat pump (answer: 4.22).
c) Find the power input required to drive the compressor (answer: 5.05 hp).
TIN = 40OF
1000 SCFM -
TOUT = 90OF
QCONDENSER
CO
Condenser
2
160 psia
Expansion
Compressor
WCOMPRESSOR
Valve
Evaporator
30 psia
QEVAPORATOR

As given below Use... View the full answer

Jin
1000 SCFM
Tour
a) Refugerant from evapartor
is saturated vapor
Condense
For Ris ya table
160 psic
at 30 apsra , ( r, )
w
Valve
Saturahan tempT, = 15- 35 F
= 475-04 'n
Evaporator
Enthalpy h, =...

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